SUDO problems installing Acro 10 to El Capitan

GIF, JPG, and PNG images were declared forbidden formats when I tried to include them.

I am NOT addressing the forum from the mac but from W10 Sandy Bridge i7. I keep trying different approaches on the MacPro 3.1 (2008) seeking a solution.

Logging in as an admin user with root privileges and then running the Acro 10 installer delivers no more joy than previous.

It appears, so far, that there is not a usable etc/sudusers file.Dunno why. But I am working towards creating one. Or editing what might be there. This seems to be a process governed by the specific instance of OSX as instructions for different iterations don't have the same commands available or fail to work.

Google has been more useful, I suppose, than either this or the Apple fora or Apple tech chat.

Frankly, I'm surprised at this because (a) there is a history of this issue with Acrobat going back years (google!) and (b) the expressed disbelief or lack of understanding of what is happening.

I was an Adobe PostScript Service Bureau owner for 10-15 years. And Don;t recall pleasant thoughts directed towards Adobe tech support during that time.

Logging off. I will resolve the problem myself.

Gosh. There are hundreds of threads about Super User issues from Snow Leopard on up. Try Google. Or even the Apple Forums.<G>

And my experience with El Cap on my MacPro 3.1 and High Sierra on my Mini 5.2 is at extreme variance from yours. And at variance from what I was told on the Apple forums.

On the Apple forum I was told this is a security provision ("SIP") to prevent intrusion, but I've already mentioned this earlier in this thread. And that to include myself (the administrator) as a "Super User" who's password is required to overcome such restrictions and this can be done via Terminal. About which I have no knowledge and into which I am reluctant to venture.

I'd like to include a screen shot image of the Get Info box (showing that "system"" has R/W, but "wheel" (whatever that is) and "everyone" have only R access) but PNG, PDF, JPG, BMP, GIF, and PSD are all "forbidden"--what image format is acceptable for an image attachment? And a text file of the installer log (edited to eliminate 30-31 pages of sudo permission denied) cannot be included either. All of which would prove my point.

The heart of the matter is not what Apple does or does not do, but that an Adobe product cannot be installed because of a reaction to such installation by the system software: nothing the user can do about it without going in and altering the system itself, which should not be necessary. AND Adobe has provided workarounds for a similar if not the same issue on earlier versions of OSX...which do not work for me.

Yes. But there IS a "super user" as part of a security package Apple instituted in the past. The same security package that won't let the disc metrics app from the app store test a system disc.

Info on the system drive lists me as having read only access. And I lack permissions to change this...even as the owner and administrator.

The purpose is to defeat bad apps from inserting items in the system.

There are ways to turn this off, but I'd rather not have to dive into learning terminal.

The same problem occurs with Acrobat DC as well. So there must be a workaround.

The log file refers to SUDO not permitting the installer to start xyz. permission denied.

There are google results describing this issue going back years and years. None of the solution proposed for Leopard, Lion, Maverick, and such seem to work.